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Progress in solving the problem of hand-arm vibration for chain saw operators in Sweden, 1967 to date.

Proceedings of the international occupational hand-arm vibration conference, October 28-31, 1975, Cincinnati, Ohio. Wasserman DE, Taylor W, Curry MG, eds. Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHEW (NIOSH) Publication No. 77-170, 1977 Apr; :218-224
Progress in solving the problem of hand-arm vibration for chain saw operators in Sweden from 1967 to date is reviewed. When the National Swedish Testing Institute for Agricultural Machinery measured vibration in chain saws in 1974, the average vibration level of the chain saws used in Sweden had been reduced to 30 to 40 Newtons from some 150 Newtons in 1967 as a result of manufacturers' technical improvements. Since 1973, the National Swedish Board of Occupational Safety and Health has restricted the maximum permissible vibration level of chain saws sold in Sweden to 50 Newtons. In 1967 and 1974, the National Swedish Institute of Occupational Health and the Forestry Occupational Health Services in Vasterbotten, Ltd, gave forestry workers in northern Sweden medical examinations. The percentage of traumatic vasospastic disease or vibration induced white fingers among chain saw operators in the county of Vasterbotten had decreased from 50 percent in 1967 to 28 percent in 1974. Furthermore, of the 28 percent, 19 percent had significantly improved; the remaining 9 percent had not improved nor deteriorated.
Power-tools; Vibration-control; Vibration-damping; Vibration-suppression; Standards; Exposure-limits; Lumber-industry-workers; Logging-workers; Dead-finger; Incidence; Cardiovascular-system-disorders; Epidemiology
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Proceedings of the international occupational hand-arm vibration conference